Display panel and display apparatus

Abstract

Provided are a display panel and a display apparatus including the same. The display panel includes: a first substrate and a second substrate provided opposite to each other; an electrophoretic display layer located between the first substrate and the second substrate, where the electrophoretic display layer includes dams and accommodating cavities defined by the dams, and an electrophoretic medium is provided in the accommodating cavities; and a sealing layer located between the electrophoretic display layer and the first substrate; where the electrophoretic medium includes a first additive, and a surface energy of the first additive is less than a surface energy of the electrophoretic medium. In the display panel and the display apparatus, the adhesive force of the sealing layer to the dams can be increased, improving a bonding strength of liquid-liquid interface contact, which is conducive to improving the sealability of flexible packaging.

What is claimed is: 
     
         1 . A display panel, comprising
 a first substrate and a second substrate provided opposite to each other;   an electrophoretic display layer located between the first substrate and the second substrate, wherein the electrophoretic display layer comprises dams and accommodating cavities defined by the dams, and an electrophoretic medium is provided in the accommodating cavities; and   a sealing layer located between the electrophoretic display layer and the first substrate;   wherein the electrophoretic medium comprises a first additive, and a surface energy of the first additive is less than a surface energy of the electrophoretic medium.   
     
     
         2 . The display panel according to  claim 1 , wherein
 the electrophoretic medium forms an interface raised towards the sealing layer.   
     
     
         3 . The display panel according to  claim 1 , wherein
 the surface energy of the first additive is less than 25 mN/m.   
     
     
         4 . The display panel according to  claim 1 , wherein
 the first additive is a hydrophobic material, and a mass percentage of the hydrophobic material in the electrophoretic medium is 0.01% to 1%.   
     
     
         5 . The display panel according to  claim 1 , further comprising:
 a bonding layer located between the electrophoretic medium and the sealing layer;   wherein the electrophoretic medium comprises a second additive, the sealing layer comprises a third additive, the bonding layer is formed by a reaction between the second additive and the third additive, and the bonding layer is located on a surface of the sealing layer close to the electrophoretic display layer.   
     
     
         6 . The display panel according to  claim 5 , wherein
 the second additive comprises a silicon-containing compound, the third additive comprises a silane coupling agent, and the bonding layer has Si—O—Si chemical bonds.   
     
     
         7 . The display panel according to  claim 6 , wherein
 a chemical formula of the silicon-containing compound is represented by Formula I:   
       
         
           
           
               
               
           
         
         in the Formula I, X represents a hydrolyzable group, and R 1  is selected from an active group capable of interacting with an organic resin; and 
         a chemical formula of the silane coupling agent is R 2 —Si(OM) 3 , wherein R 2  is selected from the organic group, and OM represents a hydrolyzable alkoxy. 
       
     
     
         8 . The display panel according to  claim 7 , wherein
 X is selected from a halogen atom, an alkoxy group, and an acyloxy group; R 1  is selected from at least one of an amino group, a mercapto group, a vinyl group, an epoxy group, a cyano group, and a methacryloyloxy group; and R 2  is selected from at least one of an amino group, a vinyl group, a methyl group, an epoxy group, a mercapto group, and an acryloxypropyl group.   
     
     
         9 . The display panel according to  claim 6 , wherein
 a mass percentage of the second additive in the electrophoretic medium is 0.01% to 1%, and a mass percentage of the third additive in the sealing layer is 0.05% to 1%.   
     
     
         10 . The display panel according to  claim 1 , further comprising:
 a hardened layer located between the electrophoretic medium and the sealing layer;   wherein the electrophoretic medium comprises a fourth additive, a density of the fourth additive is lower than a density of the electrophoretic medium, the hardened layer is formed by a crosslinking reaction between the fourth additive and the sealing layer, and the hardened layer is located on a surface of the sealing layer close to the electrophoretic display layer.   
     
     
         11 . The display panel according to  claim 10 , wherein
 the fourth additive has a first active group, an adhesive used for forming the sealing layer has a second active group, and the first active group and the second active group each are independently selected from at least one of a carbon-carbon double bond, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, an aldehyde group, and a haloalkyl group.   
     
     
         12 . The display panel according to  claim 10 , wherein
 the fourth additive comprises a multifunctional acrylic monomer with a density less than 1.2 g/mL.   
     
     
         13 . The display panel according to  claim 12 , wherein
 the multifunctional acrylic monomer comprises at least one of ethylene glycol diacrylate, 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, tetraethylene glycol dimethacrylate, trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, propoxylated glycerol triacrylate, and pentaerythritol triacrylate; and the sealing layer comprises polyacrylate and/or polymethacrylate.   
     
     
         14 . The display panel according to  claim 10 , wherein
 the hardened layer has intermolecular hydrogen bonds.   
     
     
         15 . The display panel according to  claim 10 , wherein
 a Shore hardness of the hardened layer is greater than 50 HA.   
     
     
         16 . The display panel according to  claim 1 , wherein
 materials of the dams and the first substrate include polymers with polar groups, and the sealing layer is connected to the dams and the first substrate through dipole-dipole interaction.   
     
     
         17 . The display panel according to  claim 1 , wherein
 within a range of a single accommodating cavity among the accommodating cavities, an included angle between the sealing layer sealing the accommodating cavities and a side wall of the dam is less than 90°.   
     
     
         18 . The display panel according to  claim 1 , wherein
 within a range of a single accommodating cavity among the accommodating cavities, an edge thickness H 1  of the sealing layer sealing the accommodating cavity and a middle thickness H 2  of the sealing layer satisfies: 1 nm≤H 1 -H 2 ≤100 nm.   
     
     
         19 . The display panel according to  claim 1 , wherein
 an orthographic projection area of a top surface of the dam away from the second substrate on the second substrate is greater than an orthographic projection area of a bottom surface of the dam close to the second substrate on the second substrate.   
     
     
         20 . A display apparatus, comprising a display panel, wherein the display panel comprises:
 a first substrate and a second substrate provided opposite to each other;   an electrophoretic display layer located between the first substrate and the second substrate, wherein the electrophoretic display layer comprises dams and accommodating cavities defined by the dams, and an electrophoretic medium is provided in the accommodating cavities; and   a sealing layer located between the electrophoretic display layer and the first substrate;   wherein the electrophoretic medium comprises a first additive, and a surface energy of the first additive is less than a surface energy of the electrophoretic medium.